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Title:
JMDMT #1854 Microfossils of Cyanobacteria in Carbonaceous Meteorites
Description:
The James M. DuPont Meteorite Collection - are straight screws, they probably result from a late deformation episode at low temperature. No evidence of recrystallization is detected in kamacite. Millimeter-sized FeS nodules are common, often partially surrounded by schreibersite with 30 wt% Ni, indicating an equilibration temperature %3C500 degrees C. Smaller schreibersites are also found isolated, and still smaller rhabdites (0.25-1 micrometers) are detected in the kamacite and along kamacite-taenite interfaces, with up to 50 wt% Ni. Associated chromites and silicates, in the size range 100-300 micrometers, are usually found at the troilite-kamacite interface. All silicates we analyzed were low-Ca pyroxene with 11 wt% FeO. Finally, elongated grains of native Cu are seen at the periphery
Author:
h4ck3rm1k3
Tags:
Meteorite, Life, Fossils, Cyanobacteria, Carbonaceous,
JMDMT #1854 Microfossils of Cyanobacteria in Carbonaceous Meteorites
Description:
The James M. DuPont Meteorite Collection - are straight screws, they probably result from a late deformation episode at low temperature. No evidence of recrystallization is detected in kamacite. Millimeter-sized FeS nodules are common, often partially surrounded by schreibersite with 30 wt% Ni, indicating an equilibration temperature %3C500 degrees C. Smaller schreibersites are also found isolated, and still smaller rhabdites (0.25-1 micrometers) are detected in the kamacite and along kamacite-taenite interfaces, with up to 50 wt% Ni. Associated chromites and silicates, in the size range 100-300 micrometers, are usually found at the troilite-kamacite interface. All silicates we analyzed were low-Ca pyroxene with 11 wt% FeO. Finally, elongated grains of native Cu are seen at the periphery
Author:
h4ck3rm1k3
Tags:
Meteorite, Life, Fossils, Cyanobacteria, Carbonaceous,
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